Cacti is a complete frondend to rrdtool, it stores all of the
nessesary information to create graphs and populate them with
data in a MySQL database.
The frontend is completely PHP driven. Along with being able
to maintain Graphs, Data Sources, and Round Robin Archives in
a database, cacti handles the data gathering also. There is
also SNMP support for those used to creating traffic graphs
with MRTG.
The plugin architecture patch has been applied